/*---------------------------------------------------------------------------*\
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License
    This file is part of OpenFOAM.

    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

Class
    Foam::greyDiffusiveViewFactorFixedValueFvPatchScalarField

Description
    This boundary condition provides a grey-diffuse condition for radiative
    heat flux, \c qr, for use with the view factor model

Usage
    \table
        Property     | Description             | Required    | Default value
        qro          | external radiative heat flux | yes    |
        emissivityMode | emissivity mode: solidRadiation or lookup | yes |
    \endtable

    Example of the boundary condition specification:
    \verbatim
    <patchName>
    {
        type            greyDiffusiveRadiationViewFactor;
        qro             uniform 0;
        emissivityMode  solidRadiation;
        value           uniform 0;
    }
    \endverbatim

See also
    Foam::radiationCoupledBase
    Foam::radiationModel
    Foam::radiationModels::viewFactor
    Foam::fixedValueFvPatchField

SourceFiles
    greyDiffusiveViewFactorFixedValueFvPatchScalarField.C

\*---------------------------------------------------------------------------*/

#ifndef greyDiffusiveViewFactorFixedValueFvPatchScalarField_H
#define greyDiffusiveViewFactorFixedValueFvPatchScalarField_H

#include "radiationCoupledBase.H"
#include "fixedValueFvPatchFields.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

/*---------------------------------------------------------------------------*\
      Class greyDiffusiveViewFactorFixedValueFvPatchScalarField declaration
\*---------------------------------------------------------------------------*/

class greyDiffusiveViewFactorFixedValueFvPatchScalarField
:
    public fixedValueFvPatchScalarField,
    public radiationCoupledBase
{
    // Private Data

        //- External radiative heat flux
        scalarField qro_;


public:

    //- Runtime type information
    TypeName("greyDiffusiveRadiationViewFactor");


    // Constructors

        //- Construct from patch, internal field and dictionary
        greyDiffusiveViewFactorFixedValueFvPatchScalarField
        (
            const fvPatch&,
            const DimensionedField<scalar, volMesh>&,
            const dictionary&
        );

        //- Construct by mapping given a
        //  greyDiffusiveViewFactorFixedValueFvPatchScalarField onto a new patch
        greyDiffusiveViewFactorFixedValueFvPatchScalarField
        (
            const greyDiffusiveViewFactorFixedValueFvPatchScalarField&,
            const fvPatch&,
            const DimensionedField<scalar, volMesh>&,
            const fieldMapper&
        );

        //- Disallow copy without setting internal field reference
        greyDiffusiveViewFactorFixedValueFvPatchScalarField
        (
            const greyDiffusiveViewFactorFixedValueFvPatchScalarField&
        ) = delete;

        //- Copy constructor setting internal field reference
        greyDiffusiveViewFactorFixedValueFvPatchScalarField
        (
            const greyDiffusiveViewFactorFixedValueFvPatchScalarField&,
            const DimensionedField<scalar, volMesh>&
        );

        //- Construct and return a clone setting internal field reference
        virtual tmp<fvPatchScalarField> clone
        (
            const DimensionedField<scalar, volMesh>& iF
        ) const
        {
            return tmp<fvPatchScalarField>
            (
                new greyDiffusiveViewFactorFixedValueFvPatchScalarField
                (
                    *this,
                    iF
                )
            );
        }


    // Member Functions

        // Access

            //- Return external radiative heat flux
            const scalarList& qro()
            {
                return qro_;
            }


        // Mapping functions

            //- Map the given fvPatchField onto this fvPatchField
            virtual void map(const fvPatchScalarField&, const fieldMapper&);

            //- Reset the fvPatchField to the given fvPatchField
            //  Used for mesh to mesh mapping
            virtual void reset(const fvPatchScalarField&);


        // Evaluation functions

            //- Update the coefficients associated with the patch field
            virtual void updateCoeffs();


        // I-O

            //- Write
            virtual void write(Ostream&) const;


    // Member Operators

        //- Inherit assignment
        using fixedValueFvPatchScalarField::operator=;
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //
